WO1998029265A1

WO1998029265A1 - Method and apparatus for curved-surface transfer

Info

Publication number: WO1998029265A1
Application number: PCT/JP1997/004490
Authority: WO
Inventors: Kazuhisa Kobayashi; Mitutoyo Miyakoshi; Masaru Okamoto; Haruo Miyashita; Hirohisa Yoshikawa; Haruo Ono; Reiko Kan; Kazuo Kitamura; Tutomu Ichihashi
Original assignee: Dai Nippon Printing Co., Ltd.
Priority date: 1996-12-27
Filing date: 1997-12-08
Publication date: 1998-07-09
Also published as: EP0891881A4; EP0891881B1; US6110316A; EP0891881A1; KR19990087276A; DE69722781T2; DE69722781D1; KR100308135B1; ES2200199T3

Abstract

In order to manufacture a decorative material by joining a transfer sheet on a three-dimensionally uneven surface of a base, solid particles are made to strike the back of the transfer sheet (S) opposed to the uneven surface of the base (B), and the transfer sheet (S) is brought into pressure contact with the uneven surface of the base (B) by utilizing the pressure of the striking, so that the transfer may be made. When a hot-drawable transfer sheet is used, the transfer is made by heating one or more of the base, the transfer sheet and the solid particles.

Description

Description Curved surface transfer method and apparatus

TECHNICAL FIELD The present invention relates to a method and an apparatus for transferring a curved surface for manufacturing a decorative plate for exterior and interior materials of a house, furniture, home electric appliances and the like, particularly a decorative plate having a pattern on an uneven surface.

Background art

2. Description of the Related Art Conventionally, decorative boards obtained by decorating a substrate surface of a decorative board by a direct printing method, a laminating method, a transfer method, or the like have been used for various purposes. In this case, if the surface of the base material is flat, it is easy to decorate the pattern. However, the surface with irregularities is decorated with special measures.

For example, in the case of pillars such as window frames and facing materials, the base material decoration surface has two-dimensional irregularities [a shape having a curvature only in one direction (a direction perpendicular to the generatrix or height direction) like a cylinder]. One applicable curved surface decoration technology is proposed in Japanese Patent Publication No. Sho 61-5895. That is, the technology of the publication is a surface decoration method by a laminating method, in which a surface-coated sheet coated with an adhesive on one side is supplied, while the base material is horizontally conveyed at a speed synchronized with the supply temperature of the surface-coated sheet. Then, the adhesive-coated side of the surface-mounting sheet is pressed stepwise against the base material for each small area while maintaining the state where the end of the surface-mounting sheet is not adhered by a large number of holding jigs. In this case, the surface mounting sheet is adhered to the surface of the base material by heating. This method is called a rubbing method.

In addition, as a curved surface decoration technique applicable when the surface unevenness is a three-dimensional unevenness such as an embossed shape (that is, a shape having a curvature in two directions like a hemisphere), for example, Japanese Patent Application Laid-Open No. 5-139 This is proposed in Japanese Patent Publication No. 097. That is, the technology of the publication is a surface decoration method by a transfer method, and a thermoplastic resin film is used as a support for a transfer sheet. Using a film, a transfer sheet having a structure in which a release layer, a pattern layer, and an adhesive layer are sequentially provided on the support is placed on a substrate having a convex curved surface, and a rubber hardness of 60 ° is applied from the back surface of the support. The decorative board is obtained by pressing the following rubber heat roll and transferring the picture. In addition, a foam layer is provided between the support and the release layer, which foams by the heat during transfer, and the foam is used to follow the uneven surface of the base material.

However, according to the conventional method as described above, the technique disclosed in Japanese Patent Publication No. 61-5895 can only deal with a two-dimensional curved surface.

The technology proposed by the publication No. 1 3 9 0 9 7 can cope with three-dimensional curved surfaces, but in order to follow the surface irregularities by utilizing the elastic deformation of the heat roll that rotates like a pot due to the rubber, a shallow embossed shape Is not applicable to large surface irregularities. In addition, a soft rubber mouth is easily worn out due to the corners of the unevenness of the transfer substrate. Further, in a configuration in which a foam layer is provided on the transfer sheet, the transfer sheet becomes too complicated and expensive. In addition, the transfer force is limited to a flat base material as a whole. Furthermore, in the above prior art, a heating hole is used, and the pressure disappears instantaneously when the heating roll is separated from the base material. The heat cannot be removed abruptly due to limitations in heat capacity and heat conductivity. As a result, the adhesive force of the feeling was inevitably << because the transfer sheet was released from the pressing of the heating roll without cooling down sufficiently, the transfer sheet was lifted from the surface of the base material, and there was a problem that the transfer force of the concave portion was poor.

An object of the present invention is to provide a curved surface transfer method and a curved surface transfer apparatus that can apply a transfer sheet to any three-dimensional curved surface.

Disclosure of the invention

According to the present invention, there is provided a curved surface transfer method for transferring a transfer sheet to an uneven surface of a transfer-receiving substrate having an uneven surface, wherein a transfer sheet including a support sheet and a transfer layer on the surface is prepared. The transfer layer side of the transfer sheet is made to face the uneven surface of the material described above, and solid particles collide against the support sheet side of the transfer sheet. A curved surface transfer method is provided in which a transfer sheet is pressed against an uneven surface of an ES material and transferred.

Further, according to the present invention, there is provided a curved transfer device for transferring a transfer sheet onto a concave-convex surface of a transfer-receiving substrate having a concave-convex surface, the pressure applying device having means for ejecting solid particles, and a pressure applying device facing the pressure applying device. To transport the SS material to the surface where the unevenness surface pressure application device is directed; M sending device, the pressure application device, and the above-mentioned irregularity of the Eg material transported to the opposite position And a transfer sheet feeding device for feeding a transfer sheet to and from the front surface.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1A is a schematic front view showing a part of a curved surface transfer device according to a first embodiment of the present invention in cross section.

FIG. 1B is a vertical sectional side view of the pressure applying device of FIG. 1A.

2A and 2B are plan views showing different arrangements of the injection nozzle.

FIG. 3 is a graph showing an example of the distribution of the collision pressure of solid particles in the width direction.

FIG. 4 is a view showing one form of the ejection direction of the particles.

FIG. 5A is a plan view showing an example of the surface irregularities of the base material.

FIG. 5B is a perspective view showing another example of the surface irregularities of the base material.

FIG. 6A is a schematic front view showing a part of a curved surface transfer device according to a second embodiment of the present invention in cross section.

FIG. 6B is a longitudinal side view of the pressure applying device of FIG. 6A.

FIG. 7A is a side view of an impeller used for the pressure applying device.

FIG. 7B is a diagram illustrating a mode of pressure application by the impeller of FIG. 7A.

FIG. 8 is an explanatory view showing another mode of pressure application by another impeller.

FIG. 9 is a partially cutaway perspective view of the impeller of FIG.

FIGS. 1OA and 10B show different modes of adjustment of the impeller of FIG. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the H½ form of the curved surface transfer method and the curved surface transfer device of the present invention will be described. 1A and 1B show a first embodiment of a curved surface transfer device for performing the curved surface transfer method of the present invention.

The curved surface transfer device shown in FIG. 1A is a device for sequentially transferring a pattern or the like to a flat base material having a rough surface using a long transfer sheet. The apparatus shown in FIG. 1 includes a base feeding device 2 for a base material B, a sheet feeding device 4 for a transfer sheet S, and a pressure applying device 6 for colliding the solid particles P with the transfer sheet ¾¾ and applying an impact. The transfer sheet S includes a support sheet and a transfer layer on the surface thereof.

The transport device 2 is composed of an endless track type compare belt, a row of drive rotary rollers for transport, etc., and transports the substrate B placed thereon horizontally in the order shown in FIG. The substrate surface is sequentially exposed to the impact of solid particles and then discharged. The sheet feeding device 4 includes a sheet feeding device 7, a guide roller 8, a sheet support device 9 shown in FIG. IB, a peeling roller 10, a sheet discharging device 11, and the like. The sheet feeding device 4 transfers the transfer sheet S from the supply roll set in the sheet supply device 7 to the pressure application device 6 via the guide roller 8, so that the collision pressure is not applied to the pressure application device 6. The transfer sheet S is conveyed at the same transport speed as the base material B while leaving a slight gap between the transfer sheet S and the base material B so as to float. The transfer sheet S is supplied in such a manner that the transfer layer on one side thereof faces the substrate B side. The gap between the transfer sheet S and the base material B is maintained by a sheet support device 9 including a belt or the like that rotates in accordance with the transfer of the transfer sheet S while holding both ends of the transfer sheet 3 from both sides. Is done. Further, the sheet supporting device 9 prevents the solid particles P, and further, the solid particles P from flowing between the base material B and the air-fluid transfer sheet S that transports the solid particles. Then, the support sheet of the transfer sheet S that is in close contact with the base material B by the pressure applying device 6 is separated from the base material B by the separation roller 10 and wound by the sheet discharge device 11. Transfer layer of transfer sheet remains on substrate 1. You.

The pressure applying device 6 causes the solid particles P to collide with the back surface (the support sheet side) of the transfer sheet S, and collects and reuses the solid particles P. The pressure applying device 6 is composed of a blower such as a hopper 12 and a blower (or a compressor 13, a manifold 14, multiple nozzles 15, a chamber 16, a particle discharge pipe 17, a vacuum pump 18, etc.) The solid particles P stored in the hopper are mixed with the air fed from the blower 13 by the manifold 14, distributed from the manifold 14, and sent to the plurality of nozzles 15. Then, the solid particles P are ejected along with the airflow ejected from the nozzle 15. After ejecting from the nozzle 15 and colliding with the transfer sheet S, the solid particles P are collected at the lower part of the chamber 16. From there, the discharge pipe 17 is sucked and transferred by the vacuum pump 18, collected in the original hopper 12, and stored for reuse.The chamber 16, the solid ejected from the nozzle 15, Transfer the transfer sheet S and the base material B so that the particles P do not leak out Except for, it covers the periphery of the base material B and the transfer sheet S to be transferred, the nozzle 15, etc. In addition, the pressure applying device 6 in FIG. A heating device 19 for preheating the substrate B is also provided.

Next, an embodiment of the curved surface transfer method of the present invention will be described based on the apparatus of FIG. 1A and FIG.

First, the base material B in the form of a plate, whose transfer surface is an uneven surface, is transferred one by one into the chamber 16 of the pressure applying device 6 by the base material transfer device 2. On the other hand, as the transfer sheet S, a sheet in which a transfer layer composed of a decoration layer and a sensitive adhesive layer is formed on a support sheet of a thermoplastic resin is used here. The transfer sheet S is tensioned by the sheet feeding device 4, and is unwound from the supply roll set in the sheet supply device 7, passes through the guide roller 8, and enters the chamber 16 of the pressure application device 6. enter. In the chamber 16, the transfer sheet S is opposed to the base material B such that both sides in the width direction are sandwiched by the sheet support device 9, and the adhesive layer side faces the base material B side to be conveyed. Slightly above With a space in the crab, it is transported at a constant speed in parallel with the substrate B to be transported. In the apparatus shown in FIG. 1A, the transfer sheet S is preheated by the heating device 19 in the chamber 16 of the pressure application device 6 before the collision pressure is applied, so that the extensibility of the sheet and the adhesiveness of the sheet can be obtained. Activation of the agent layer is performed. At the same time, the transfer surface of the substrate 1 located under the transfer sheet S is also heated, and the adhesive layer facilitates the adhesion. With these, the thermal bonding by the adhesive layer of the transfer sheet is performed smoothly.

Next, the transfer sheet s is exposed to the collision of the solid particles P ejected from the nozzle 15 together with the air flow. A large number of nozzles 15 are arranged linearly in the direction (width direction) crossing the transfer direction of the transfer sheet S and the base material B and vertically to the back surface of the transfer sheet. As a result, the solid particles ejected from the nozzle 15 P applies an impulse to the transfer sheet S substantially in the width direction over a substantially entire width of the transfer sheet S. Note that the solid particles P ejected from the nozzles 15 advance in the direction of the transfer sheet S while spreading somewhat, so that the solid particles P also collide with the region between the nozzles 15 arranged. Then, the transfer sheet S, which is slightly lifted and transferred to the base material B by the impact of the solid particles, is pressed against the base material B and further transferred into the concave portion of the uneven surface of the base material B. Since the sheet S is extended, the transfer sheet follows and adheres to the uneven surface shape of the base material B. Although the base material B used in the description here has irregularities on the surface, it is a flat plate-shaped material having a strong envelope shape as a whole, and the transfer sheet S has both sides in the width direction. When the sheet B is closed by the sheet supporting device 9 and no impact is applied to the base material B, the transfer sheet S is transported away from the surface of the force base material 1. The adhesion of the transfer sheet S to the base material B is performed earlier in the center in the width direction and later in the vicinity of both ends in the width direction. Accordingly, as a whole, the transfer sheet S and the base material B are transported at the same speed and are sequentially exposed to the impact pressure in the flow direction. This is a means for leaving air between the base material B and the transfer sheet S so that they do not adhere to each other when they come into close contact with each other. On the other hand, the solid particles P that have been subjected to the collision with the transfer sheet S bypass the side surface of the sheet support 9 and are discharged toward the lower part of the chamber 16 connected to the discharge pipe 17. . Then, it is sucked from the lower part of the chamber 16 by the discharge pipe 17 and collected in the original hopper 12. Also, the air used for ejecting the solid particles and ejected from the nozzle 15 is sucked by the discharge pipe 17 and discharged out of the system by the vacuum pump 18. In this way, the chamber 16 prevents the solid particles from flowing out together with air from the opening of the entrance through which the transfer sheet and the base material enter and exit. At this time, it is preferable that the pressure in the chamber 16 be lower than that of the outside, in order to prevent the fixed member 流出 from flowing out of the chamber 16. Then, the transfer sheet S in close contact with the base material 排出 is discharged to the outside of the chamber 16 in a state of being in close contact with the base material 、. Peeled off. As a result, the decorative layer of the transfer sheet S is transferred to the concave and convex surface of the base material via the adhesive layer, and the decorative board 20 is obtained. On the other hand, the support sheet of the transfer sheet S after passing through the peeling roller 10 is transported obliquely upward and taken up by the sheet discharge device 11 as a discharge roll. The base material 1 after passing through the peeling roller 10 is horizontally conveyed leftward in FIG.

The above is one embodiment of the curved surface transfer method of the present invention. The method of the present invention will be described in more detail.

As the substrate B that can be used, the surface to be transferred can of course be applied to a flat surface, but the present invention shows its true value because the surface to be transferred is an uneven surface, and in particular, the unevenness is three-dimensional. It is a substrate. Conventional holding jigs that come into contact with rotation (the aforementioned Japanese Patent Publication No. Sho 61-5895) and rubber transfer rolls (see the aforementioned Japanese Patent Application Laid-Open No. Hei 5-13997), Due to the inherent directionality of the rotation axis, applicable surface irregularities are limited to two-dimensional irregularities having curvature only in one axis direction, and the latter have two-axis curvature. Even if three-dimensional unevenness is possible, its three-dimensional shape is arbitrary It cannot be applied uniformly in the direction of. For example, unless the longitudinal direction of the wood grain pipe pattern is parallel to the feeding direction of the transfer sheet, it cannot be successfully transferred to the recess of the pipe. Moreover, in the latter case, the shape of the base material is limited to a flat plate shape, and otherwise, it is impossible unless a transfer roll having a special shape tailored to each base material shape is used.

However, as described above, in the present invention, since the impact of solid particles that can behave fluidly is used, the direction of pressure application is essentially required for the three-dimensional shape of surface irregularities. Do not have. (This directionality is the direction of the temporal change in the position of a point on the substrate to which pressure is applied.) Therefore, a substrate having irregularities in the transfer sheet or substrate feeding direction It can also handle wood. In other words, it means that transfer can be performed on two-dimensional irregularities having irregularities only in the feed direction or the width direction, and three-dimensional irregularities having irregularities in both the feed direction and the width direction. The point that the present invention does not have the above-mentioned directionality is that a sheet and a transfer sheet are placed on a substrate and pressed and adhered one by one (the present invention may have such a form). Given this, it is easy to understand.

Further, the substrate that can be treated in the present invention may be not only a plate material as a whole but also a substrate having two-dimensional irregularities that are convex or concave in an arc shape and are curved in the feeding direction or the width direction. The surface may have finer three-dimensional surface irregularities. In the present invention, it is possible to arbitrarily select whether to transfer the two-dimensional unevenness such as the arc shape of the base material as the width direction or the feed direction in consideration of workability and the like. .

A substrate having an uneven surface having fine irregularities superimposed on large irregularities, or a substrate having a surface to be transferred to the bottom of the concave portion or the inner surface of the concave portion of the irregular surface can be used. The large irregularities and the large irregularities are, for example, as shown in FIG. 5B, the irregularities of the base material B are composed of large irregularities 7 Ob on the convex portions 70 a of the large irregularities. The concavo-convex shape is composed of those with a 1 of 1 to 1 O mm, a concave portion 70 c with a width of 1 to 1 O mm, and a convex portion 70 a with a width of 5 mm or more. , Large recess in both step and width Smaller than the convex shape, specifically the step is 0.1 to 5

The width of the concave portion and the width of the convex portion are not less than 0.1 mm, and are approximately less than 1 Z 2 of the width of the convex portion having large irregularities. The form of the surface constituting the uneven surface is not limited to a flat surface, but may be any curved surface only, or a combination of a flat surface and a curved surface. Therefore, the curved surface on the substrate to be transferred according to the present invention also means an uneven surface having no curved surface composed of only a plurality of planes, such as a step-shaped cross section. Further, the curvature in the present invention includes an infinite curvature (radius of curvature = 0) which is angular like a side of a cube or the present periphery.

The material of the base material B that can be used is arbitrary. For example, in the case of a plate material, calcium gay acid plate, extruded cement plate, ALC (lightweight foamed concrete) plate, GRC (nitrate)

Non-porcelain kiln mm plate such as 維 i reinforced concrete plate), woodworking or wood plywood, particle board, or wood plate such as wood medium density fiberboard (MDF), iron, ル Lumidium Metal plates such as copper, ceramics such as ceramics and glass, and resin thighs such as polypropylene, ABS resin, and phenol resin may be used. The surface of these substrates may be coated in advance with an easy-adhesion primer to assist in bonding with the adhesive, or a sealer that seals off and seals the microporous and porous surface. good. As an easily bondable bramer or a sealer that seals and seals the fine irregularities and porosity on the surface, a resin such as isocyanate, a two-part curable urethane resin, an acrylic resin, or a vinyl acetate resin is used.

In addition, in order to make the surface of the base material have desired irregularities, press working, embossing, extrusion, cutting, molding, or the like may be used. The shape of the unevenness is arbitrary.For example, the unevenness of the stone surface such as joints of tiles and bricks, the cleavage surface of granite, the unevenness of the surface of the wood plate such as wood paneling and the floating grain, lysine tone, stucco tone, etc. Of the spray-painted surface.

Next, as the transfer sheet S that can be used in the present invention, as long as the base material B has a three-dimensional uneven surface, it is possible to use a support sheet made of paper or the like having no extensibility < In order to apply it to a three-dimensional uneven surface that exhibits its true value, a transfer sheet having stretchability is used at least at the time of transfer. When the impact Ji of the solid particles is applied due to the extensibility, the transfer sheet is closely adhered to the inside of the concave portion on the substrate surface, and the transfer is performed.

As described above, the transfer sheet includes the support sheet and the transfer layer that transfers and transfers. The transfer layer is composed of at least a decorative layer, and if an adhesive layer is further laminated, applying an adhesive to one or both of the transfer sheet and the substrate at the time of transfer can be omitted. The stretchability of the transfer sheet is mainly governed by the stretchability of the support sheet. Therefore, if a rubber film is used as the support sheet, it is possible to follow, adhere to, and transfer the uneven surface of the base material without heating the transfer sheet or the like at the time of transfer, due to the properties of the rubber that is stretched at room temperature. . Also, if a thermoplastic resin film is used as the sculpture, it has almost no stretchability during the formation of the decorative layer, and as a transfer sheet that expresses sufficient stretchability by heating during transfer, it can be easily formed like a conventionally known ordinary transfer sheet. A transfer sheet that can be used in the present invention can be prepared. Regarding the stretchability of the support sheet, even the biaxially stretched polyethylene terephthalate film, which has been widely used in the past, develops the necessary and sufficient stretchability by setting the heating conditions and the impact pressure conditions depending on the surface unevenness. The transfer of the curved surface is possible. And, materials that easily exhibit stretchability at low temperature and low pressure, such as copolymer polyester films such as polybutylene terephthalate and terephthalate isophthalethylene copolymer, polyethylene films, polypropylene films, and polymethylpentene films Low-stretch or non-stretch films such as polyolefin films, vinyl chloride resin films, and nylon films, and rubber (elastomer) films such as natural rubber, synthetic rubber, urethane elastomers, and olefin elastomers are also preferred. The material of the sheet.

In addition, the support sheet is provided on the transfer layer side with an improved releasability from the transfer layer, if necessary. For this purpose, a layer I may be formed. This g | M layer is peeled off from the transfer layer together with the support when the support is released. For the layer I, for example, a simple substance such as a silicone resin, a melamine resin, a polyamide resin, a urethane resin, a polyolefin resin, and a resin, or a mixture of two or more of these are used.

The decorative layer is formed by a conventionally known method such as gravure printing, silk screen printing, offset printing, or the like, a pattern layer printed with a pattern or the like by using a material, or a metal such as aluminum, chromium, gold, or silver by using a known vapor deposition method or the like. Target or L is a metal thin film layer formed on the entire surface, etc., which is used according to the application. A wood pattern, a stone pattern, a tile pattern, a brick pattern, a solid pattern, or the like is used as the pattern according to the surface irregularities of the base material. The ink for the picture layer is composed of a vehicle such as a binder, a coloring agent such as a pigment or a dye, and various additives suitable for the vehicle. The binder is made of an acrylic resin, a vinyl chloride-vinyl acetate copolymer, a polyester resin, a cellulosic resin, a polyurethane resin, a fluororesin, or the like, or a mixture containing them. As the pigment of the colorant, inorganic pigments such as titanium white, black black, red iron oxide, graphite, ultramarine blue, etc., and organic pigments such as aniline black, quinacridone, isoindolinone, and phthalocyanine blue are used. Further, in order to adjust the releasability between the support sheet and the decorative layer or the like, providing a layer such as a peeling layer between these layers is the same as in a conventionally known transfer sheet. The adhesive layer is also a conventionally known one made of a photosensitive thermoplastic resin such as polyvinyl acetate, an acrylic resin, a polyamide resin, a block isocyanate, a rigid polyurethane resin and the like. The adhesive layer of the transfer sheet can be omitted when the decorative layer itself has adhesiveness or when an adhesive layer is provided on the side of the substrate to be transferred.

There is also a method in which the adhesive layer is provided on the transfer sheet. A method in which the adhesive layer is not provided on the transfer sheet but is provided on the transfer sheet by coating or the like immediately before transfer, or the adhesive layer is applied on the base material side in advance or immediately before Or various forms such as a method of providing an adhesive layer on both the transfer sheet and the substrate in advance or immediately before. Adhesive layer only on transfer sheet side This method has the advantages that it can be formed by printing or the like at the same time as the decoration layer, and that the time and equipment required during transfer can be omitted. When the adhesive is applied to one or both of the transfer sheet and the base material immediately before, an adhesive such as a pressure-sensitive adhesive or a water-based adhesive may be used. When the substrate is porous, it is convenient for drying the adhesive to be applied immediately before drying. In this case, it is possible to use a guide roller 8 having a large number of needles as the guide roller 8 of the transfer sheet feeder 4 to pierce the transfer sheet when the sheet passes, and to assist drying by the holes. The diameter of the holes is usually about 0.1 to 1.0 mm, and the space between adjacent vents is usually about 5 to 50 mm.

The adhesive may be a β-sensitive adhesive, a pressure-sensitive adhesive, an electrode | radiation hard <b adhesive, or the like. As the β-sensitive adhesive, any of a heat-sealing type using a thermoplastic resin and a thermosetting b using a thermosetting resin can be used. However, from the viewpoint that the bonding is completed in a short time, the heat-sealing type is preferable.

Conventional heat-fusing adhesives include polyvinyl acetate, acrylic resin, thermoplastic polyester resin, thermoplastic urethane resin, and polyamide resin obtained by condensation polymerization of dimeric acid and hexamethylenediamine. In addition to a known heat-sensitive adhesive, a moisture-hardening heat-sensitive adhesive can be used. In addition, the moisture-hardening heat-sensitive adhesive is applied immediately before transfer from the viewpoint of work stability because the curing reaction proceeds due to moisture in the air when left unattended.

Thermosetting adhesive is an adhesive that activates adhesion by the curing reaction force progressing by heating.Once the heating proceeds to the curing reaction, the adhesive force is obtained, so even if it is cooled, The support ί ^ can be peeled and removed. Such a thermosetting resin serving as a thermosetting adhesive may be in the form of a solid or a liquid at room temperature. Specific examples thereof include a phenol resin, a urea resin, a diaryl phthalate resin, and a thermosetting resin. Hard b-urethane resin, epoxy resin or the like can be used. Although the thermosetting adhesive has a slight difficulty in exhibiting a low adhesive strength, it has an advantage that the adhesive strength during actual use thereafter is excellent. Moisture-hardening heat-sensitive adhesives show the same adhesive force change during pressure contact and peeling as ordinary heat-sensitive adhesives, but the cross-linking reaction progresses gradually during peeling and hardens because No heat melting, excellent heat resistance, etc., and large adhesive strength. However, since the initial adhesive strength is sufficient as in the case of the heat-melting adhesive, there are no drawbacks such as pattern missing during transfer, and the product has excellent productivity. However, after the transfer is completed, the veneer after transfer is left in the air containing moisture to cure the adhesive in order to promote the crosslinking and hardening of the adhesive with moisture.

Moisture-hardening heat-sensitive adhesives are a type of heat-sensitive adhesives. Moisture-hardening heat-sensitive M adhesive is applied immediately before transfer from the viewpoint of work stability, because the curing reaction proceeds with moisture in the air when left unattended. In addition, the moisture-hardened heat-sensitive M adhesive has the same adhesive strength immediately after transfer as a normal heat-sensitive adhesive, but the cross-linking / curing reaction gradually proceeds due to moisture in the air when allowed to stand naturally. Ultimately, there is no creep or hot melting, and it has excellent heat resistance and a large adhesive strength. However, in order to promote the crosslinking and curing of the adhesive by moisture after the transfer is completed, the transfer material is left to cure in the air containing. Preferable atmospheric conditions for curing are generally a relative humidity of 50% RH or more and an air temperature of 10 ° C or more. The higher the temperature 'relative' M, the faster the cure will be. The standard curing completion time is usually about 10 hours in an atmosphere of 20 ° C. and 60% RH.

The moisture-hardening heat-sensitive adhesive is a curable product containing a prepolymer having an isocyanate group at an end as an essential component. The prepolymer is usually a polyisocyanate prepolymer having one isocyanate group at each of both ends, and is a solid thermoplastic resin at room temperature. The isocyanate groups react with each other due to the force of water in the air to cause a chain elongation reaction. As a result, a reactant having a urea bond in the molecular chain is produced, and the terminal urea bond further reacts with the urea bond. This causes a piuret bond to cause branching and a cross-linking reaction. The skeleton structure of the FI cliff of the prepolymer having an isocyanate group at the end is an arbitrary force. Specifically, there are a polyurethane skeleton having a urethane bond, a polyester skeleton having an ester bond, a polybutazine skeleton, and the like. Adhesive properties can be adjusted by appropriately employing one or two of these i 物 ± skeleton structures. When a urethane bond is present, the terminal isocyanate group also reacts with the urethane bond to form an araphanate bond, which also causes a cross-linking reaction.

Specific examples of the polyisocyanate prepolymer include, for example, a polyurethane skeleton having an isocyanate group at a good end obtained by reacting an excess of polyisocyanate with a polyol, and having a urethane bond in a cliff. There are prebolimers. Further, a polyester polyol and a polyol having a polybutadiene skeleton are added to polyisocyanoate as described in Japanese Patent Application Laid-Open No. Sho 64-4-1287 with an optional) f to cause an addition reaction. The obtained crystalline urethane prepolymer having a structure in which a polyester skeleton and a polybutadiene skeleton are bonded by a urethane bond and having an isocyanate group at the ^^ terminal, or

As disclosed in Japanese Patent Publication No. 305882, a polycarbonate-based urethane prepolymer and a polyester-based polyol having two ± isocyanate groups in ^ F obtained by reacting a polycarbonate-based polyol and a polyisocyanate are disclosed. Among them, polyester-based urethane prepolymers having two or more isocyanate groups among the compounds obtained by reacting polyisocyanates are exemplified.

Further, in addition to the above-mentioned various polyisocyanate prepolymers, in addition to the above-mentioned various kinds of polyisocyanate prepolymers, in addition to the above-mentioned essential reactions, a thermoplastic resin, a tackifier, Various auxiliary materials such as plasticizers and fillers can be added. These secondary materials include, for example, ethylene-vinyl acetate copolymer, polyethylene, modified polyolefin, atactic polypropylene, wire Thermoplastic resin such as polyester-like polyester, ethylene-ethyl acrylate (EAA), etc., tackifiers such as terpene-phenol resin, rosin abietic acid ester, and fine powders such as calcium carbonate, barium sulfate, silica, and alumina Fillers (constructive pigments), dressing materials, m, water defibrillation, storage stability, anti-aging agents, etc. Electron radiation curable resin [Electrostatic radiation curable resin used as an adhesive is a composition curable by electron radiation; specifically, a radical heavy ^ ft unsaturated bond or It is preferably used as a prepolymer (including so-called oligomers) having a cationic weight, and a fiber which can be hardened by an electro-optic ray obtained by appropriately mixing z or a monomer. These prepolymers or monomers are used alone or as a mixture of two or more. In addition, ultraviolet rays (UV) or electricity (EB) is usually used for the electric fiber radiation.

The above-mentioned prepolymer or monomer specifically has, in the molecule, a radical heavy group such as a (meth) acryloyl group, a (meth) acryloyloxy group or the like; a cationic heavy group such as an unsaturated group or an epoxy group; And the like. In addition, a polyzene thiol-based prepolymer obtained by a combination of polyene and polythiol is also preferably used. In addition, for example, a (meth) acryloyl group means an acryloyl group or a methacryloyl group.

Examples of prepolymers having radical heavy unsaturated groups include polyester (meth) acrylate, urethane (meth) acrylate, epoxy (meth) acrylate, melamine (meth) acrylate, and triazine (meth) acrylate. it can. As the amount, usually 250 to L0, 0, 00 ^ ^ is used.

Examples of the monomer having a radical heavy ft unsaturated group include monofunctional monomers such as methyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and phenoxethyl (meth) acrylate. Also, as a multifunctional monomer, Diethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylo-propane ethylene oxide amide (meta) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol Hexa (meth) acrylate is also available.

Examples of pre-polymers having a cation-eating! ^ Are prepolymers such as bisphenol-type epoxy resins, epoxy resins such as novolak-type epoxy compounds, and vinyl ether resins such as fatty vinyl ethers and aromatic vinyl ethers. .

Examples of the thiol include polythiols such as trimethylolpropane trithiodalicholate and pentaerythritol tetrathioglycolate. Examples of the polyene include a polyurethane made of a diol and diisocyanate with both ends provided with aryl alcohol. In the case of curing with ultraviolet rays or visible males, a photopolymerization initiator is further added to the above-mentioned electromagnetic fiber curable resin. In the case of a resin having a radical heavy ft unsaturated group, acetophenones, benzophenones, thioxanthones, benzoin, and benzoin methyl etherenoles can be used alone or in combination as a photopolymerization initiator. In the case of a resin having a cationic heavy functional group, an aromatic diazonium salt, an aromatic sulfonium salt, an aromatic rhododium salt, a meta-mouth compound, a benzoinsulfonic acid ester or the like may be used alone or as a photopolymerization initiator. It can be used as a mixture. The addition amount of these photopolymerization initiators is about 0.1 to 10 parts by weight based on 100 parts by weight of the electro-brittle radiation-curable resin. In addition, as the electromagnetic fiber radiation, an electromagnetic wave or a charged particle force having a molecule capable of crosslinking a molecule in the adhesive is used. Usually, ultraviolet light or electricity is used, but visible males, X-rays, ion beams, and the like can also be used. UV source Light sources such as ultra-high pressure mercury lamps, high pressure mercury lamps, low pressure mercury lamps, power bon arc lamps, black lights and metal halide lamps are used. As the wavelength of the ultraviolet light, a wavelength range of usually 190 to 380 nm is mainly used. As the power source, various electron beam accelerators such as Cockcroft-Walton type, Van degraft type, Resonance ^ E type, Insulating core ¾ £ E type, or linear type, dynamitron type, high frequency type etc. are used. An electron beam having an energy of 100 to 100 keV, preferably 100 to 300 keV is used.

If necessary, a thermoplastic resin such as a vinyl chloride-vinyl acetate copolymer, polyvinyl acetate, an acrylic resin, or a cellulose resin may be added to the above-mentioned electron beam-curable resin. If used without adding a diluting solvent, it becomes a hot melt adhesive.

In the case of using an electric fiber radiation hard adhesive, it is possible to incorporate an electron beam irradiation device for irradiating an ultraviolet ray electron beam into a curved surface transfer device. Irradiation is performed during, after, or during and after the application.

Further, various additives can be further added to the various resins described above, if necessary. These additives include, for example, extenders (fillers) composed of fine powders such as calcium carbonate, barium sulfate, silica, and alumina; and thixotropic agents such as organic bentonite (especially for transfer-receiving substrates having a large uneven step). In such a case, it is advisable to add the adhesive force in order to prevent the adhesive force from flowing into the concave portion.

The adhesive is applied to the transfer sheet, the substrate to be transferred, or both the transfer sheet and the substrate to be transferred. The adhesive is applied to the sheet such as the transfer sheet to the substrate to be transferred. In this method, the solvent dissolved or dispersed in a solvent is applied as a dispersion or a solvent-free solution. However, a conventional gravure roll coating or the like, or a solution by an applicator or the like is used. D) It may be applied by law. If used without adding a diluent solvent, drying is not necessary. For example, heat-sensitive adhesives are used as solventless hot melt adhesives, respectively. Can be used. In addition, it is also possible to apply an electric radiation hardening adhesive or the like. Since it is not used when used as a hot-melt adhesive, high-speed production is possible without drying, even immediately before transfer. The adhesive coating material is usually about 10 to ²⁰⁰ g / m ² (solid content), although it differs depending on the type and surface condition of the substrate to be transferred.

When the adhesive is applied to the substrate to be transferred at the time of transfer, the substrate position ⁶⁰ can be used. Further, when an adhesive is applied to the transfer sheet, the same arrangement as that of the base material can be employed. In addition, when the adhesive is used as a hot melt adhesive, and when the transfer sheet is further modified to follow the concave and convex shape of the substrate to be transferred and transferred, the support of the transfer sheet is necessarily made of polypropylene resin or the like. It is necessary to select a material exhibiting thermoplasticity or rubber elasticity at room temperature or in a heated state as in the case of the thermoplastic resin sheet, which is a material with low heat resistance when viewed from another point of view. It means that you have to choose. Therefore, when the adhesive is melted to form a transfer sheet, if the thickness of the adhesive layer is increased, the heat generated at the time of fusion will weaken the support, and the application of the adhesive in the heated state in the adhesive! The sheet sticks to the evening roller, and the sheet may be stretched, distorted, or entangled by one bow.

Therefore, in such a case, it is preferable that the transfer sheet is formed by applying an adhesive via a sheet (separator) instead of directly melting the adhesive on the sheet. That is, an adhesive is heated and melted on a ¾I sheet having heat resistance and ¾I property, and then the II sheet and a sheet to be a transfer sheet are once heat-laminated with a nipple or the like with the applied adhesive. By peeling only the β sheet from the sheet using a peeling roller or the like, heat damage to the sheet is reduced, and a transfer sheet formed with a strong adhesive layer can be obtained.

, Sheets do not need stretchability, etc., and are heat-resistant resin sheets such as biaxially stretched polyethylene terephthalate sheet, polyethylene naphthalate, polyarylate, polyimide, etc. A conventionally known sheet can be obtained in which the surface is treated with a resin such as silicone resin, polymethylpentene, or the like with a base material such as paper or paper. The thickness of the sheet is usually about 50 to 200 // m.

The timing of heating the adhesive to activate and thermally fuse the adhesive using a heat-sensitive adhesive Ife adhesive is used before the impact is applied, during the application of the impact, or before and during the application of the impact. Either may be used. The heating of the adhesive is performed by heating the transfer sheet and the substrate to be transferred. The material on the side where the adhesive has been applied (the transfer sheet or the substrate to be transferred) may be heated, the material on the side where the adhesive strength is not applied may be heated, or both materials may be heated. You may. In addition, heating solid particles may be used for heating during the application of the shock. _{C The} chemical materials obtained by the method and apparatus for transferring a curved surface of the present invention described above include an outer wall, a roof, a windshield, and a gable plate. , Interior materials such as walls, ceilings, etc., 建 Doors, handrails, sills, doors and other fixtures, furniture surface materials such as chests of drawers, light electric appliances, OA thigh cabinets, and automobile interior materials Can be used in various fields.

The surface of the cosmetic material after the transfer may be further coated with a transparent protective material. As such a transparent protective layer, one or more of a fluororesin such as polytetrafluoroethylene and polyvinylidene fluoride, an acrylic resin such as polymethyl methacrylate, a silicone resin and a urethane resin are used as a binder. If necessary, use a paint to which an ultraviolet absorber such as benzotriazole and ultrafine particle oxide, a Kogan such as a hinderamine-based radical scavenger, a coloring pigment, an extender pigment, a lubricant and the like are added. Spray coating, flow coating, etc. are used for coating. The thickness of the transparent protective film S is 1 to: about L00 m.

Heating before transfer is performed, if necessary, for the extensibility of the transfer sheet, the activation of the adhesive layer, and the heating of the substrate-bonded surface. The heating means is optional, and as in the heating apparatus 19 shown in the curved surface transfer apparatus in FIG. 1A, the heating means before the impulse application is, for example, heater heating, infrared heating, induction heat, induction heating, hot air heating. Etc. can be used You. Further, in the present invention, since solid particles are used for pressure application, the solid particles can be heated, and the solid particles can be used as a heating source for a transfer sheet or the like, and can be heated at the same time as the transfer adhesion. Heating the solid particles means that the gas ejected from the nozzle is also heated and ejected together with the solid particles. When this gas comes into contact with the back of the photo sheet, the gas is also used as a heating source. Can be. Therefore, even when a heating power for the transfer sheet or the like is required, a heating device for preheating can be omitted if the heating by the solid particles or the ejected gas is sufficient.

The solid particles p used are inorganic powders such as glass beads, ceramic beads, calcium carbonate beads, alumina beads, and zirconium beads; (11 cubic, iron, or iron alloy such as carbon steel, stainless steel, etc.) Metal particles such as metal alloys such as aluminum alloys such as aluminum, or duralumin, zinc, titanium, etc., or fluorine beads, nylon beads, silicone resin beads, urethane resin beads, urea resin beads, phenol resin beads, cross-linking Solid particles such as resin beads such as rubber beads can be used, although spherical shapes are preferred, but other shapes can also be used. πι¾¾ Note that by using heated solid particles for the solid particles, transfer by heating the transfer sheet It is also possible to improve the extensibility of the sheet, activate the adhesive force by heating the heat-sensitive adhesive, and perform heat curing by heating the thermosetting adhesive together with the pressing of the transfer sheet. In this case, the transfer sheet and the base material to be transferred may be heated by another heating means before the impact is applied, and may be activated by heating with a heat-sensitive adhesive. For the purpose of promoting cooling after bonding, solid particles having a temperature lower than the temperature of the adhesive at the time of bonding can be used as the cooling solid particles. It can be used as cooling solid particles, as heating solid particles and cooling solid particles, or as a transfer sheet or It is also possible to sufficiently heat a substrate to be transferred, an adhesive or the like that requires heating, and use the cooled solid particles to form and transfer and bond the transfer sheet almost simultaneously. Cooling and heating of solid particles involves cooling and heating the solid particles during storage in a hopper that stores the solid particles. In a hopper, heat is applied by heat conduction from the hopper, induced heat (when the solid particles are a dielectric), and induction heating (when the solid particles are a conductor or a magnetic material).

It is preferable to use a plurality of nozzles 15 so that the collision area force of the solid particles colliding with the transfer sheet has a desired shape. In the curved transfer device shown in FIG. 1A, the transfer area is arranged in a straight line at right angles to the transfer direction of the transfer sheet and the base material to form a strip-shaped collision area linearly in the width direction. For example, FIG. 2A shows a configuration in which the collision areas are arranged in two rows in the feed direction in order to expand the collision area in the feed direction. Fig. 2B shows a single-row arrangement, but the center in the width direction is such that it collides upstream in the feed direction. In this arrangement, the transfer sheet is pressed against the substrate starting from the center in the width direction and is sequentially pressed toward both ends in the width direction. In this way, the transfer sheet is prevented from adhering to the substrate while the air is trapped in the center in the width direction.

Also, the solid particles do not need to be uniform throughout the collision area. Fig. 3 shows an example in which the peak pressure distribution is set at the center in the width direction and the peak pressure decreases as the distance to both ends in the width direction decreases. The setting of the impulse is based on the opening and closing amount of the valve, the size of the inner diameter of the pipe that conveys the solid particles connected to the lube, and the gas pressure immediately before the nozzle using a pressure regulator (regulator). It is controlled by controlling the velocity of the solid particles and the gas flow. Setting the pressure distribution as shown in FIG. 3 produces an effect similar to the effect of FIG. 2B described above. In addition, in the conventional curved surface transfer method using a rubber transfer roll, if the diameter of the center portion of the transfer roll is increased, the force at the center can be strengthened in terms of pressure. Contact is applied and pressure is applied, and the transfer of the transfer sheet cannot be performed uniformly. The nozzles were arranged horizontally and horizontally in the curved transfer device illustrated in FIG. 1A because the substrate was flat. This is an arrangement in which solid particles collide perpendicularly to the transfer surface of the substrate. The reason for the vertical collision is that the collision can be used most effectively. Therefore, for example, as shown in Fig. 4, if the transferred surface of substrate 1 (the cross-sectional shape perpendicular to the transport direction) is a dome-shaped convex curved surface, a plurality of nozzles are prepared and each nozzle is mainly used. It is preferable to arrange the nozzles perpendicularly to the adjacent surface of the object to be transferred, so that the solid collides almost perpendicularly with the respective impacting surfaces. In this manner, the nozzle arrangement should be adjusted so that the solid particles collide with the solid particles as perpendicularly as possible in accordance with the uneven shape of the target substrate.

The nozzle ejects solid particles together with the gas flow, and its structure is, for example, a hollow cylinder, a polygonal pillar, or a fish tail. The nozzle may also have a single opening, or may be partitioned internally into a honeycomb. Spray pressure is usually 0. 1~:. L O k gZ cm 2 ^ Ru der. In addition, the solid particles, the transfer sheet, or the substrate may be charged when the solid thread is transported and collides with the transfer sheet. Therefore, in order to prevent electrification, the nozzle 15 and the discharge pipe 17 are grounded, a static elimination bar is brought into contact with the transfer sheet, or an ion having a charge that neutralizes the charge in the airflow. It is preferable to remove static electricity by mixing. The static elimination is performed as necessary before, during, or after the transfer.

Also, specific examples of decorative patterns of decorative boards having three-dimensional surface irregularities include, for example, tile-like, brick-like, stucco-like, lysine-like, granite-like stone-like, siding-like, etc. Applicable to woodgrain etc. of floating woodgrain boards.

麵 Example 1

Next, the present invention will be further described with reference to examples. First, as a base material having three-dimensional surface irregularities, joints as shown in Fig. 5 form a recess with a width of 7 mm and a depth of 5 mm. A brick-patterned three-dimensional surface asperity 21 calcium carbonate plate was prepared, and an acrylic emulsion-based sealer / primer was applied to the surface at 30 g / m ² . A 50 / m-thick polypropylene film was used as the transfer sheet, and a pigment consisting of carbon black, red iron oxide, titanium white, yellow I & A, an atari resin and vinyl chloride-vinyl acetate An ink consisting of a binder of a 1: 1 weight ratio mixture with a polymer resin, a brick-like pattern as a decorative layer, and a sensitive adhesive layer made of a vinyl chloride vinyl acetate copolymer resin 10 zm 7 gravure printing

Next, using the apparatus of FIGS. 1A and 1B, the base material was placed horizontally with the uneven surface facing up, and the transfer sheet was placed with the adhesive layer surface down. Next, the transfer sheet and the base material are preheated from the transfer sheet side by radiant heat generated by electricity and a heater, and spherical nylon beads with a particle size distribution of 0.2 to 0.8 mm are ejected from the nozzle as solid particles together with air at room temperature to transfer. The transfer sheet was pressed against the substrate by colliding with the back of the sheet. The spray pressure was 0.4 kg / cm ² , and the pressure distribution of the air flow was such that the central force in the sheet width direction was maximized as shown in Fig. 3. Then, after the transfer sheet was extended into the concave portion of the joint and adhered tightly, the support of the transfer sheet was peeled off, and a cosmetic material was obtained. Further, an emulsion paint of polyvinylidene fluoride was applied to the surface of the transfer layer at a thickness of 10 / m to form a transparent protective layer, thereby obtaining a decorative material having a transparent protective layer.

6A to 8 show a second embodiment of the curved surface transfer device of the present invention. The basic configuration of this embodiment is the same as that shown in FIGS. 1A and 1B, and the same components are denoted by the same reference numerals as those shown in FIGS. 1A and 1B, and description thereof is omitted. . A configuration in which the second mode is different from the first mode will be described. In the second embodiment, as the pressure applying device 6, an ejection device 33 for ejecting solid particles P accelerated by a particle accelerator 31 using a rotating impeller from an ejection guide 32 is used. Jetting device 3 Solid particles P jetted from 3 are transferred to the support sheet side of the transfer sheet S. The transfer sheet S is pressed against the transfer base material B by applying a collision.

This curved surface transfer device includes a heating device 19 for the transfer sheet S and an addition 41 for the base material B. These heating devices 19 and 41 serve as heating means for activating the adhesive force when the adhesive layer strength of the transfer layer <the sensitive adhesive. Further, a suction / exhaust nozzle 51 and a vacuum pump 52 are provided below the conveyance path of the substrate B as the suction / exhaust means 50 so that air can be removed between the transfer sheet S and the substrate B. Further, a base rainbow device 60 for irradiating the base material B with the sensitive adhesive is provided in the base unit, and when the adhesive has a solvent component, the heating device 41 also serves as a drying device for drying the solvent. «Basic M-feeding device 40 as a feeding means is composed of a row of driving drive rollers, and sequentially feeds substrate B placed horizontally on it, and ejects it from ejection device 33. Transported to the position where solid particles collide ₀

In the case where the transfer sheet S is separated from the base material B by another apparatus in a separate step, or when the separation is performed manually, the separation roller 10 can be omitted.

The pressure applying device 6 causes the solid particles P to sequentially collide with the side of the support sheet of the transfer sheet S, presses the transfer sheet S against the uneven surface of the base material B, and follows and press-contacts. The solid particles P after the collision are collected and reused. The pressure applying device 6 is the ejector device 33 for ejecting the solid particles P accelerated by the particle accelerator 31 from the ejection guide 32, the hopper 12 and the chamber 16 and the discharge pipe 17 and the gas and solid particles. It is composed of a separation device 37, a vacuum pump 18 and the like.

The ejector device 33 includes at least a particle accelerator 31 using an impeller, and if necessary, as shown in FIGS. 6A and 6B, only the ejection portion of solid particles is opened. An ejection guide 32 covering the periphery of the particle accelerator may be provided so that the ejection directions of the solid particles accelerated by the particle accelerator 31 are aligned by the ejection guide 32.

The shape of the opening of the ejection guide 32 is, for example, hollow cylindrical, polygonal, conical, The shape is a polygonal pyramid, a shape, or the like. The ejection guide may have a single opening, or may have an interior partitioned into a honeycomb (honeycomb) shape. If the solid particles, the transfer sheet, or the substrate to be transferred are charged when the solid particles are conveyed and collide with the transfer sheet, the ejection guide 32 or the discharge pipe 17 may be used to prevent the charge. It is preferable that the charge is removed by grounding the transfer member, contacting a transfer sheet with a charge removing bar, or mixing ions having a charge neutralizing charge into an air flow. The timing of static elimination is before transfer, during transfer, or after transfer.

The material of the impeller of the particle accelerator 31 may be appropriately selected according to the type of solid particles, such as ceramic or metal such as steel or titanium. Since solid particles are accelerated by contact with the impeller, if metal beads or unemployed particles are used for the solid particles, the particles are of a high quality.The impeller should be made of ceramic with good wear resistance. . When resin beads are used as solid particles, they are softer than metal particles, and therefore may be made of steel. The shape of the blade 31a of the impeller 31 is a force that is typically a flat plate (a rectangular parallelepiped) as shown in FIGS. 7A and 7B. In addition, a curved curved plate, a propeller shape such as a screw propeller, etc. It is also possible to use it, and select it according to the application and purpose. The number of the blades 31a is plural, and is usually selected from a range of a maximum of 10 blades. By adjusting the shape, number, rotation speed, and the supply speed and supply direction of the solid particles, the direction of the accelerated (blow-out), the discharge speed, and the divergence angle of the accelerated solid particles are adjusted. Usually, solid particles are supplied from above or obliquely above the particle accelerator. The ejection direction of the solid particles can be equal vertically downward as shown in Figs. 6 6 and 6 6, horizontal or diagonally downward (not shown) as shown in Figs. 7Α and 7Β.

Even if only one jetting device is used, a force is possible depending on the area of the collision pressure application area.If the S¾ force is large, use a plurality of them to make the collision area of the solid particles hitting the transfer sheet the desired shape. It is good to become. For example, the transfer sheet and the base material to be transferred are arranged in a plurality of rows in a straight line at right angles to the feeding direction, and the width of the band-shaped impulse is linearly wide in the width direction. It is a projection area. Alternatively, a staggered arrangement may be used. Alternatively, as in FIG. 2B, the central portion is located on the upstream side from both ends in the width direction, and the pressing of the transfer sheet to the transfer-receiving substrate starts from the central portion in the sheet width direction, and sequentially proceeds toward both ends in the width direction. It may be pressed. By doing so, it is possible to prevent the transfer sheet from adhering to the transfer-receiving substrate while holding air in the center in the width direction. Further, in order to lengthen the impact application time, a multi-stage arrangement in which two or more rows are arranged in the feed direction of the transfer sheet and the substrate to be transferred as shown in FIG. 2A is preferable.

Also, in the case of this embodiment, as in the case of the first embodiment, the impact of the solid particles does not need to be all uniform within the collision region. For example, there is a mountain-shaped pressure distribution in which the force at the central portion in the width direction of the transfer sheet is the greatest, and the force decreases toward both ends in the width direction. In this case, it is possible to assist the pressing force to progress in a stepwise manner from the high pressure region (the center portion in the width direction) to the low pressure region (the both sides of the sheet). Regarding the setting of the impulse, for example, the speed of the solid particles colliding with the transfer sheet is controlled by the number of revolutions of the impeller, or the mass of each of the solid surgical stanchions supplied per unit time is adjusted. Adjust by controlling.

Further, it is preferable that the solid particles P ejected from the ejector 33 collides perpendicularly with the transfer surface of the substrate B (as a whole), since the impact can be used most effectively. Therefore, as in FIG. 4, if the surface of the substrate to be transferred is a convex surface such as a dome type, a plurality of ejection guides 32 are prepared for the convex surface and each ejection guide is provided. Therefore, the ejector 33 may be arranged so that the solid particles collide with the transfer surface substantially vertically.

In addition, acceleration and ejection of solid particles by the particle accelerator 31 are performed by setting the chamber 35, the particle accelerator 31 and its surroundings to a vacuum, and the impeller can be rotated in the atmosphere. By supplying the solid particles together with air, it is preferable to eject the solid particles together with the air flow. The dimensions of the impeller are usually about 5 to 50 cm in diameter, the width of the impeller is 5 to 20 cm, the length of the impeller is almost the diameter of the impeller, and the rotation speed of the impeller is 50 to 500 It is about rpm. The ejection velocity of solid particles is 10 to 50 m / s, and the injection density is 10 to: L 50 kg / m ² ^.

The solid particles P that have collided with the transfer sheet S collect at the lower part of the chamber 16, from which the discharge pipe 17 is sucked and conveyed by the vacuum pump 18 and separated from the gas by the separation device 37, Collected in the original hopper 12 and stored for reuse. The chamber 16 is provided with the base material B and the transfer sheet S, which are used for the transfer, except for the entrance and exit of the transfer sheet S and the base material B, so as not to leak the solid particles P ejected from the ejector 33 to the outside. 3 Covers around 3.

In the second embodiment, on the upstream side of the pressure applying unit 6, a base material coating device 60 and a base heating device 41 (also a drying device) are provided in this order from the upstream side. The same heating device 41 as the sheet heating device 19 can be used. The base material X apparatus 60 applies a feeling, an adhesive, and an undercoat to the base material B. When the heat-sensitive adhesive is applied to the base material B, the base material heating device 41 also serves as a heating means for the heat-sensitive adhesive. The heating device 41 heats the base material B to be transferred, but when the adhesive dissolves and the volatile components such as' need to be dried, or when the volatile components of the undercoat coating need to be dried. May also be used as a drying device. In the case where the adhesive is not applied to the substrate to be transferred at the time of the transfer and the undercoat is not applied, the substrate 60 can be omitted. The base heating device 41 can also be omitted if heating of the substrate to be transferred is unnecessary and drying is not necessary. In the case of performing both the application of the feel and the adhesive and the undercoating, although not shown, another substrate coating device is provided further upstream of the substrate coating device 60, and a drying device is provided as appropriate ( If not shown), it can be a continuous processing device. In addition, the lower coating is performed for the purpose of transferring, for example, coloring the base material to be transferred, primer treatment for easy adhesion, and sealing treatment.

Next, a method of transferring a curved surface using the apparatus according to the second embodiment described above will be described. The plate-shaped transfer substrate B having an uneven transfer surface is conveyed one by one by the base shelving device 40, and the base material device 60 feels and adhesives! : Yes. If there is any residue in the adhesive, the base material and the heat-sensitive adhesive are heated and activated by the base heating device 41, and the evaporation is volatilized and dried. Note that the base material device 60 and the base α heat device 41 may be used in combination to continuously perform undercoating or sealer coating before undercoating before the adhesive. Then, the transfer-receiving base material B is transported and supplied into the chamber 16 of the pressure applying unit 6.

The transfer sheet S is applied with tension by the sheet transporting unit 4, and the transfer sheet S is unwound from the supply roll set in the sheet feeding device 7, passes through the guide roller 8, and is supplied to the chamber 16 of the pressure applying unit 6. Get in. When a transfer sheet is applied with a feeling and an adhesive at the time of transfer, the adhesive is applied with an adhesive while the transfer sheet is supplied from the sheet sending device 7 to the pressure applying section 6. Also, the drying power of the adhesive <If necessary, after drying by drying, supply to the pressure applying unit.

Further, when the transfer sheet S enters the chamber 16, the sheet is supported at both ends in the width direction by the sheet supporting device 9 so that the surface on the transfer layer side faces the transferred base material B side. Then, a slight space is opened above the substrate B to be transferred, and the substrate B is transferred at a constant speed in parallel with the substrate B to be transferred. The transfer sheet S is heated by the sheet heating device 19 before being nipped and conveyed by the sheet supporting device 9 and receiving the impact E. Further, the sheet heating device 19 in the figure has a structure in which the transfer sheet is heated in a state in which the transfer target sheet B and the transfer sheet S are strongly conveyed. Is also heated. Therefore, the heating is a temperature increase for improving the stretchability of the sheet and activating the adhesive. The transfer sheet is also indirectly heated by the substrate to be transferred, which is heated by the base heating device 41 and supplied to the pressure applying unit 6.

When transferring the transfer sheet in the vicinity of the base material to be transferred at the same transport speed, whether the transfer sheet is slightly separated from the base material to be transferred or transferred in contact with the base material depends on the base material to be transferred. The shape of the surface irregularities, the preheating of the substrate to be transferred, the thermal properties of the transfer sheet, the impact E of the solid, the activation of the adhesive, and the like are properly considered. In terms of equipment, the distance between the substrate to be transferred and the transfer sheet to be transferred is adjustable.

Next, the transfer sheet S is exposed to the collision of the solid particles P ejected from the ejector 33. The momentum of the change in the momentum of these solid particles at the time of collision causes the transfer sheet S to be pressed against the substrate B. Then, the transfer sheet is pressed against the substrate to be transferred by the solid particles, and the transfer sheet is also extended into the recesses on the uneven surface of the substrate to be transferred. By being brought into close contact with the substrate to be transferred by the heat-sensitive adhesive which has become active and exhibits adhesive force, it is pressed against the substrate to be transferred.

In addition, of course, the transfer area is only the convex portion of the base material to be transferred, and if the inside of the concave portion is unnecessary, the transfer sheet is completely formed along the uneven surface shape, and is completely adhered to the entire surface. Needless to say, there is no need.

The solid particles P that have been subjected to the collision with the transfer sheet S bypass the side surface of the sheet supporting device 9 and collect at the lower part of the chamber 16, from which they are sucked by the discharge pipe 17 and are returned to the original Hono, °. Collected on 1 and 2. Also, air in the chamber 16 for transporting the solid particles P is sucked together with the solid particles P by the discharge pipe 17 and transported to the air flow and solid particle separation device 37 above the hopper 12. In the separation device 37, as shown in the figure, the solid particles P transported by the gas stream are discharged into the device cavity in the horizontal direction, and the solid particles having a higher density (or specific gravity) than the gas flow downward by their own weight. The gas flows horizontally as it is, and the remaining solid particles P that are going to move with the airflow are filtered by the filter 1 and then discharged out of the system by the vacuum pump 18. In this way, the solid particles are prevented from flowing into the chamber 16 together with air from the entrance opening through which the transfer sheet and the substrate to be transferred enter and exit.

Then, after the transfer sheet S and the base material B, which has been in close contact with the transfer sheet S, come out of the chamber 16, the support sheet of the transfer sheet S is peeled off from the base material B by the peeling roller 10. The decorative plate 20 is obtained in which the transfer layer is bonded to the substrate to be transferred with the adhesive. The sheet heating device 19 and the base W-side heating device 41, etc., which are the heating means before the impulse application, are optional. Further, the heating means may be arranged on any one of the front side, the back side, and the back side of the transfer sheet—the base material to be transferred. In addition, even during the application of heating to use as heated solid particles, the heat source of the heating device may be provided dispersed in the gap of the ejection device. When hot air heating is performed in the chamber, it is better to reduce spraying 1 ». This is because, in addition to the air used for spraying solid particles, more air is introduced into the chamber, and the vacuum pump for collecting solid particles is negative.

Heating devices for preheating the transfer sheet base material may be provided outside the chamber until they enter the chamber, inside the chamber, inside and outside the chamber. If it is installed outside and inside the chamber, it can be heated using a long transport distance even when sufficient preheating power is required, for example, when heating a substrate to be transferred having a large heat capacity. If the internal capacity of the chamber itself increases due to the provision of a long heating device inside the chamber, it is better to install a part or all of the heating device outside the chamber to reduce the internal volume of the chamber. This is because it is advantageous in handling the particles in consideration of the recovery and the like. An advantage of disposing a heating device inside the chamber is that heating can be performed immediately before or during the application of the collision pressure, and particularly, a substrate having a large heat capacity can be effectively effective only in the vicinity of its transfer surface. For example, when trying to preheat.

When the adhesive such as the adhesive layer of the transfer layer is not liquid, or when the heat-sensitive adhesive preheats to the extent that it does not become active even if heated, the transfer sheet contacts the uneven surface of the substrate. Then, the air in the gap between the transfer sheet and the substrate is extracted, and “air elimination” may be performed. With air bleeding, pneumatic force between the transfer sheet S and the base material B remains during transfer, preventing “air bleeding” and further preventing the occurrence of transfer omission. The air is evacuated by a suction / discharge unit 50 including a suction nozzle 51 and a vacuum pump 52 as shown in FIGS. 6A and 6B, for example. The suction and exhaust nozzle 51 is used to transfer the transfer sheet. On the transfer layer side and on both sides adjacent to both sides along the transfer direction of the transferred base material to be transferred, provided along the transfer direction of the transfer base material, the air between the transfer sheet and the transfer base material is evacuated. It is only necessary to suck and exhaust with the pump 52. The outer periphery of the opening of the suction / exhaust nozzle 51 is surrounded by, for example, a brush. Also, it is not good to vent the air until the impulse is applied. The timing of the air bleeding and the preheating of the transfer sheet may be started first, depending on the speed at which the transfer sheet is preheated and softened, and the degree of deterioration, but both are started simultaneously. You may. Air bleeding is effective in the case of a surface to be transferred of a substrate to be transferred, such as a rough surface or a stucco-like surface.

When an adhesive whose adhesive is fixed by cooling such as a heat-sensitive adhesive is used for the adhesive layer on the substrate to be transferred or the adhesive layer of the transfer layer, the transfer sheet is placed on the substrate to be transferred. After contacting the desired transfer surface, cooling follows the inside of the recess by cooling, fixing the transferred transfer sheet there, and removing and removing the support sheet of the transfer sheet faster to prevent transfer omission and production. Speed can be improved.

For this purpose, it is preferable to use the cooled solid particles without applying the impact during the application of the impact E, or to cool the adhesive layer by another cooling means after the application of the impact. When the amount of the substrate to be transferred is large, the substrate to be transferred can be cooled from the back surface by spraying a low-temperature gas and cooling a base roller or a belt conveyor in addition to the cooled solid particles. Alternatively, after the above cooling in the chamber, the cooling may be performed outside the chamber or outside the chamber without cooling in the chamber by blowing cold air from the front or back. Note that the above-described curved surface transfer method and apparatus of the present invention are not limited to the examples shown in the drawings. For example, in the description of the curved surface transfer method using the curved surface transfer device shown in FIG. 6A, an apparatus and a method in which the transfer sheet is pressed against the transfer substrate while the transfer sheet and the transfer substrate are respectively conveyed have been described. In the method and apparatus according to the present invention, the pressing of the transfer sheet against the transfer substrate is performed only when the transfer sheet and the transfer substrate are pressed. May be stopped and intermittently performed for each base material (for example, the ejection device is moved for these). Further, the positional relationship between the transfer sheet and the direction in which the solid particles are ejected from the ejection device is not limited to the positional relationship in which the transfer sheet is placed horizontally and the solid particles are ejected from directly above in the vertical direction. Even if the ejection direction of the solid particles with respect to the back surface of the transfer sheet maintains the vertical relationship, the transfer sheet may be placed or transported in a direction other than horizontal, such as oblique, up, down, etc. Even if the solid particles are horizontal, the back surface may be ejected from the bottom, that is, from bottom to top. Of course, solid particles may be ejected at an angle to the backside of the transfer sheet.

In addition, by using a substrate to be transferred on which an adhesive layer is partially formed or a transfer sheet on which a transfer layer or an adhesive layer of a transfer layer is partially formed, the transfer layer is partially transferred. You can also get a board. For the partial formation, a printing method is used in addition to the ^ method. Further, in order to partially transfer the transfer layer, a transfer sheet in which a release layer made of a fluororesin, a silicone resin, or the like is partially provided on the transfer layer or on the substrate to be transferred may be used.

Difficult case 2

The substrate to be transferred having three-dimensional surface irregularities has three-dimensional surface irregularities of a brickwork pattern forming groove-shaped concave portions of joints as illustrated in FIG. 5 as an example in FIG. 5, and the irregularities are made of acrylurethane resin. We prepared a calcium acid gamut plate with a base coat and undercoat. These were performed off-line with another device.

A transfer sheet was prepared by sequentially printing a tile-like pattern as a decorative layer to be a transfer layer on one surface of a polypropylene-based thermoplastic elastomer film having a thickness of 50 zm.

Next, the base material B is subjected to the steps shown in FIGS. 6A and 6B by applying an impact pressure using an apparatus having the form shown in FIG. 7A or FIG. The substrate is placed on a transport device 40 consisting of a row of transport rollers with the surface facing up and transported. After applying the agent, The heat-sensitive adhesive and the substrate to be transferred were heated by the W-neck heating device 41 and supplied to the pressure applying section β. On the other hand, the transfer sheet S was also supplied to the pressure applying unit 6 with its support side up. When the substrate に入っ entered the chamber 16, the transfer sheet S was brought close to the substrate Β. Then, the transfer sheet S was held between a pair of endless belt-shaped sheet support devices 9. In this state, preheating of the transfer sheet, activation of the heat-sensitive adhesive, and heating of the substrate to be transferred are performed by the sheet heating device 19 using radiant heat from the support sheet side of the transfer sheet S using electricity and a heater. went.

Next, spherical iron beads having an average particle diameter of 0.8 mm were ejected as solid particles P from an ejection device 33 using a rotating impeller made of titanium as a particle accelerator, and the transfer sheet S was formed. The transfer sheet was pressed against the surface irregularities of the base material B by colliding with the side surface of the support sheet. The used particle accelerator 31 had the form shown in FIGS. 7A and 7B. The beads in the hopper are freely dropped and supplied from a distance of 10 cm from the top of the impeller at a position 60% of the radius in the horizontal direction from the 軸 ± of the impeller and the rotation axis 31c, and the horizontal Solid particles accelerated at 40 m / s were ejected in the direction. The rotation speed of the impeller was 360 rpm, the diameter of the impeller was 20 cm, and the width of the blade 31a was 10 cm. In addition, both the transfer sheet S and the base material B were transported while being supported such that the surface force was in a vertical plane as shown in FIGS. 7A and 7B.

Then, the transfer sheet is extended into the concave portion of the joint and adheres tightly. The transfer sheet is taken out of the chamber 16 and the adhesive layer is cooled and solidified. Then, the support sheet of the transfer sheet is peeled off by the peeling roller 10. Then, the siding board 20 was obtained.

8 and 9 show another example of the particle accelerator 31. FIG. The particle accelerator 31 includes an impeller and a rotary drive source such as a motor for rotating the impeller. As the particle accelerator 31, a certain type of a centrifugal blast device that sprays powder for sand plasts can be used. FIGS. 8 and 9 show an impeller 82 serving as the particle accelerator 31. FIG. The impeller 82 has a plurality of blades 83 fixed on both sides by two side plates 84: TU and The center of rotation is a hollow portion 85 having no blade 83, and solid particles P are supplied to the hollow portion 85 through a transport pipe 80 from a hopper or the like. A rotating shaft 87, which is rotatably supported by a bearing 86 and is rotated by a rotating power source (not shown) such as an electric motor, is fixed to the center of rotation of the side plate 84. 8 2 rotate. The rotating shaft 87 does not penetrate between the two side plates 84 having the blades 83 therebetween, and forms a space without a shaft. Then, the solid particles P supplied to the hollow portion 85 are guided to the space between the blades 83 and come to the outer blade portion of the hollow portion 85 by the action of the rotating impeller. It is accelerated by force and gushes from the impeller 82. In FIG. 9, the rotating shaft 87 is connected only to the outside of the side plate 84 and does not penetrate to the hollow portion 85, but in addition to this, the rotating shaft is thinner than the diameter of the hollow portion 85. May be penetrated into the hollow portion, or the inside of a hollow cylindrical rotary shaft having an opening through which solid particles pass may be used as the hollow portion.

The shape of the blades 83 is a flat plate (rectangular solid) force. In addition to this, it is also possible to use a curved curved plate, a propeller shape such as a screw propeller, etc., depending on the application and purpose. I do. The number of blades is usually selected from a range of up to about 10 blades. By adjusting the shape, number, rotation speed, and the supply speed and supply direction of the solid particles, the direction of the accelerated ejection of the solid particles, the ejection speed, the diffusion angle, etc. are adjusted. Usually, solid particles are supplied from above (上方 ± or obliquely above) the particle accelerator.

In addition, the ejection direction of the solid particles is substantially vertically downward in the example of FIGS. 8 to 1OA, but may be horizontal or obliquely downward (not shown). In order to control the direction in which the solid particles P are ejected, a hollow cylindrical shape having an opening 88 partially open in the circumferential direction is provided between the hollow 85 and the outer blade 83. The same axis of rotation as that of the impeller, which is the same as the impeller, is equipped with a directional controller 89 that is free to rotate and adjusts the blowing direction of the particles P to the opening of the directional controller 89. It can be adjusted depending on the direction. Figure 1 OA and diagram 10B indicates a mode of the ejection direction control by the direction controller 89. In these figures, the direction controllers 89 are respectively fixed at the positions shown. Of course, the outer periphery of the impeller may be further covered with an ejection guide 32 as shown in FIG. 6A except for the direction in which the solid particles are ejected. In addition, by adjusting the size of the opening of the direction controller 89 in the circumferential direction and the width direction, it is possible to adjust the ejection amount of the solid particles.

Fiber example 3

First, a 15 mm-thick gay acid force lubricating plate was prepared as a transfer-receiving substrate B having three-dimensional surface irregularities. The shape of this flat plate (envelope surface) was a rectangular parallelepiped, and on the surface thereof, a large pattern of irregularities and a superimposed force were used. As the large irregularities, the groove-like concave portion 70 c at the joint as shown in Fig. 5B has an opening width of 5 mm and a depth of 2 mm, and one piece on the surface is a flat convex portion of 5 O mm x 15 O mm 7 0a, and only β flat irregularities on the flat convex portions 70a as β irregularities. 10 points of JIS-B-0601. This is a plate material having a three-dimensional surface unevenness of a brickwork pattern. The undercoating and undercoating に were performed on this plate material by another device offline.

A transfer sheet was prepared by sequentially printing a brick-like pattern as a decorative layer as a transfer layer on one surface of a polypropylene-based thermoplastic elastomer film having a thickness of 5 Om by gravure printing.

Next, using an apparatus that goes through the steps shown in FIGS. 6A and 6B and applies a collision pressure, using an apparatus having the form shown in FIG. 8 or FIG. It is placed on a substrate feeder 40 consisting of a row of transport rollers with the surface facing up, transported, and heated and melted by a hot-melt hot-melt type heat-sensitive adhesive with substrate coating 60. After hot-melt coating without application of the agent by Apliquet, the sensation, the adhesive, and the substrate to be transferred were heated by the base heating device 41 and supplied to the impingement section 6. On the other hand, the transfer sheet S was also supplied to the impact applying section 6 with its support sheet side up. Transferred substrate B When the transfer sheet S entered the member 16, the transfer sheet S was brought close to the base material B. Then, the front and back of the transfer sheet S were sandwiched by a pair of endless belt-shaped sheet support devices 9. In this state, the transfer sheet S is heated from the support sheet side of the transfer sheet S using a radiant heat generated by an electric heater to preheat the transfer sheet, activate the sensitive adhesive, and heat the substrate to be transferred. went.

Next, spherical zinc beads having an average particle size of 0.4 mm were ejected as solid particles P from an ejection device 33 using a titanium impeller as a particle accelerator, and the transfer sheet S was formed. The transfer sheet S was pressed against the surface irregularities of the base material B by colliding with the side surface of the support sheet. The particle accelerator used had the form shown in Fig. 8 to Fig. _10B.The solid particles P used were obtained by free-falling the beads in the hopper into the hollow part provided in the center of the rotating shaft of the impeller. It supplied and ejected solid particles accelerated vertically at 4 OmZs. The rotation speed of the impeller was 360 rpm, the injection density was 100 kg / m ² , the diameter of the impeller was 20 cm, and the width of the blade 83 was 10 cm. Further, both the transfer sheet S and the base material B were transported while being supported such that the surface was in a horizontal plane as shown in FIG. 6A.

Then, the transfer sheet S is extended into the concave portion of the joint and adheres tightly. The transfer sheet S is taken out of the chamber 16, cooled and solidified with the adhesive layer force, and the support sheet of the transfer sheet S is peeled off by the peeling roller 10. Cosmetic material 20 was obtained.

ADVANTAGE OF THE INVENTION According to this invention, a large three-dimensional uneven surface decoration can be easily obtained. Of course, two-dimensional irregularities such as window frames and sashes are also possible. In addition to flat plate materials, it is easy to use wavy shapes such as tiles as a whole, or convex or concave curved shapes. can get. Also, continuous production is easy. Also, unlike the conventional rubber mouth pressing method, there is no wear of parts such as rolls due to unevenness of the base material.

Claims

The scope of the claims

1. A curved surface transfer method for transferring a transfer sheet onto an uneven surface of a substrate to be transferred having an uneven surface,

Prepare a transfer sheet consisting of a support sheet and a transfer layer on the surface,

The transfer layer side of this transfer sheet is opposed to the uneven surface of the 5

Impacting solid particles against the support sheet side of the transfer sheet;

A curved surface transfer method that uses the pressure from this collision to transfer the transfer sheet by pressing it against the uneven surface of the 5 mm material.

2. transport the substrate,

Send the transfer sheet along the substrate being transported,

2. The method for transferring a curved surface according to claim 1, comprising:

3. sending the transfer sheet to a position where the transfer sheet comes into contact with the base material through a small gap between the transfer sheet and the base material;

Colliding the solid particles at the contact position,

3. The curved surface transfer method according to claim 2, comprising:

4. The curved surface transfer method according to claim 1, wherein the collision of the solid particles is caused by ejection of particles from a nozzle.

5. The collision of the solid particles is caused by the force □ speed of the rotating impeller,

The curved surface transfer method according to claim 1.

6. Collect and reuse the solid particles that collide with the transfer sheet.

The curved surface transfer method according to claim 1.

7. Collision of the solid particles with the transfer sheet is performed in the chamber.

The curved surface transfer method according to claim 1.

8. The curved surface transfer method according to claim 1, wherein at least one of the transfer sheet and the substrate is heated before the collision of the solid particles.

9. The curved surface transfer method according to claim 1, wherein air is sucked and discharged from an area where the solid particles collide.

10. The curved surface transfer method according to claim 1, wherein the collision of the solid particles occurs at a plurality of positions in the width direction of the transfer sheet.

1 1. Collision of solid particles at multiple positions in the width direction of the transfer sheet occurs at different positions in the transfer direction of the transfer sheet.

The method for transferring a curved surface according to claim 10.

1 2. The collision strength of the solid particles is increased toward the center in the width direction of the transfer sheet.

The method for transferring a curved surface according to claim 10.

1 3. A curved surface transfer device for transferring a transfer sheet to an uneven surface of a substrate to be transferred having an uneven surface,

A pressure applying device having means for ejecting solid particles,

A base transport device for transporting the base material to a position facing the pressure application device, with the uneven surface thereof facing the pressure application device;

A transfer sheet feeding device for sending a transfer sheet between a pressure application device and the uneven surface of the base material conveyed to a position facing the pressure application device;

A curved surface transfer device comprising:

14. The curved surface according to claim 13, wherein the means for ejecting the solid particles comprises a nozzle.

15. The curved surface transfer device according to claim 14, wherein the nozzle is connected to a unit that supplies solid particles to the nozzle, and a blowing unit that sends air for jetting to the nozzle.

1 6. The means for ejecting the solid particles rotate to accelerate the fixed particles, 14. The curved surface transfer device according to claim 13, comprising an impeller to be used.

17. The curved surface transfer device according to claim 16, further comprising a device for feeding solid particles to a rotation center portion of the impeller.

1 8. A hollow cylindrical injection direction controller, which is rotatably provided at the center of rotation of the impeller so as to receive the sent fixed particles and has an opening at a part in the circumferential direction. Item 17. A curved surface transfer device according to Item 17.

13. The curved surface transfer apparatus according to claim 13, further comprising a particle discharging means for collecting fixed particles ejected from the ejecting means.

20. The curved surface transfer device according to claim 19, wherein the particle discharging device is connected to a solid particle ejection device of the pressure applying device.

21. The curved surface transfer device according to claim 13, wherein the pressure applying device includes a chamber surrounding the solid particle ejection unit.

14. The curved surface transfer device according to claim 13, wherein a suction / exhaust unit is provided at the position facing the pressure applying device.

23. The curved surface transfer device according to claim 13, further comprising heating means for heating at least one of the base material and the transfer sheet before the base material and the transfer sheet are sent to the position facing the pressure applying device. .